Alfv{acute e}n ion{endash}ion hybrid wave heating in the Phaedrus-T tokamak
- Department of Nuclear Engineering and Engineering Physics, University of Wisconsin, Madison, Wisconsin 53706-1687 (United States)
In the Phaedrus-T tokamak [R. A. Breun {ital et} {ital al}., Fusion Technol. {bold 19}, 1327 (1991)], Alfv{acute e}n waves are indirectly driven by a fast wave antenna array. Small fractions of minority ions are shown to have a large effect on the Alfv{acute e}n spectrum, as measured at the edge. An ion{endash}ion hybrid Alfv{acute e}n mode has been identified by measuring dispersion properties. Landau damping is predicted to be large and spatially localized. These Alfv{acute e}nic waves are experimentally shown to generate correlated electron heating and changes in density near the core of the tokamak plasma. Fast wave antenna fields can mode convert at a hybrid Alfv{acute e}n resonance and provide a promising route to spatially localized tokamak heating and current drive, even for low effective ionic charge {ital Z}{sub eff}{approx_equal}1.3{endash}2. {copyright} {ital 1996 American Institute of Physics.}
- Research Organization:
- University of Wisconsin
- DOE Contract Number:
- FG02-88ER53264
- OSTI ID:
- 279762
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 4 Vol. 3; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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